Traditional photoelectric catalysis technologies are limited by the needs for large external energy input. In this study, the self-powered photoelectric catalysis was established by a spherical triboelectric nanogenerator (S-TENG) under a pulsed direct-current electric field to improve the removal rate of Atrazine (ATZ). Also, the electrical output performance of S-TENG was tested. To further improve the utilization of light and degradation efficiency of ATZ, the photoelectrode (TiO₂ nanotube) and photocatalyst (6HF-TiO₂ nanosheets) were both used to degrade ATZ. The removal rate of ATZ was enhanced by 8.53%, and the mineralization was increased by 27.2% within 30 min in the photoelectric catalysis system with pulse direct-current electric field by S-TENG. The degradation mechanism of ATZ was also demonstrated by the EPR tests and free radicals quenching experiments. The result showed that the photogenerated free radicals were increased by triboelectric pulsed direct-current during the photoelectric catalysis degradation. The hydroxyl radical (•OH) played an essential role in the degradation of ATZ in the self-powered photoelectric catalysis system. In addition, the degradation pathway of ATZ was proposed in detail based on LC-MS/MS test and density functional theory (DFT) calculation. Furthermore, the toxicity of ATZ and its degradation intermediates were evaluated by the ECOSAR program. Overall, this research provides a novel strategy for enhancing the performance of self-powered photoelectric catalysis processes for wastewater treatment.

传统的光电催化技术受限于需要大量的外部能量输入。在这项研究中，通过球形摩擦纳米发电机（S-TENG）在脉冲直流电场下建立自供电光电催化，以提高阿特拉津（ATZ）的去除率。此外，还测试了 S-TENG 的电输出性能。为了进一步提高ATZ的光利用率和降解效率，光电极（TiO ₂纳米管）和光催化剂（6HF-TiO ₂纳米片）都用于降解 ATZ。S-TENG脉冲直流电场光电催化体系30 min内ATZ去除率提高8.53%，矿化度提高27.2%。ATZ的降解机制也通过EPR测试和自由基淬灭实验得到证实。结果表明，在光电催化降解过程中，摩擦电脉冲直流电增加了光生自由基。羟基自由基（•OH）在自供电光电催化系统中ATZ的降解中发挥了重要作用。此外，基于LC-MS/MS测试和密度泛函理论（DFT）计算，详细提出了ATZ的降解途径。此外，ATZ 及其降解中间体的毒性由 ECOSAR 计划评估。总体而言，这项研究为提高废水处理自供电光电催化过程的性能提供了一种新策略。